Finger guard for printing presses



G. H. DUFOUR.

FINGER GUARD FOR PRINTING PRESSES.

APPLICATION FILED JUNE 24,1920.

1,407,132, I Patented Feb. 21, 1922.

6807 e ff fiafazz/j UNITED; stare GEORGE E. nurourt,

COMPANY; or cHIcAGo, gra mar oonronarron'or ILLI-Nors,

- rinenn cue-annex Emma rian ssns.

' Application filed 'J'unefl,

To allw hom itmay concern Be it known that I, GEORGE H. Dnnonn, a

citizen of .the- UnitedfStates, residing at Oak Park, in the county ofCook and State of Illinois, have invented certain new and usefulImprovements in Finger Guards for Printing Presses, of which thefollowing is a specification. This invention relates toaguard'to beassociated with a printing press to bar theintroduction of thefingersof' the operator into the path of a" moving part when thepress isin operation. y e

In my application, Serial No. 891,314, of even date herewith, I havedescribed-and broadly claimed a devi'cefor accomplishing this-generalpurpose.

The present invention accomplishes the same result by mechanism soconstructed that the guard member, wh-ile controlled by a swinging'leverwhich is in turnsubject to a releasable detent, slides to and frombarrier position, instead of swinging through an arcuatepath defined bythe radius action 25 of the lever and guard together, and there foreoccupies a smaller area inits action and better adapts the device forembodimentwith dimensions. appropriate-to larger types of presses.

In the accompanying drawings- Fi ure 1 is a front-elevation' and Fi ure2 a side elevation of portions or a known type. ofprinting press withwhich the pres ent invention is immediately concerned.

'1 represents the bed, and .2. the platen which is moved to and from thebedin a pressof known construction; the platen beingmovedby any suitablemeans, such, for instance, as the drive wheel 3 periodically thrown intodriving relation with shaft i and its fly wheel 5 through any suitablemeans, such, for instance, as a releasing handle orlever 6. v

In. order to prevent the introduction of the fingers of the operatorbeneaththe platen 2, aguard member 7 is mounted to. assume barrierposition in relationtothe space beneath said platen, and this barrier ispreferably in the. form. of an apron or" sheet metal. or other suitablematerial pivoted at 8; upon a controlling lever 9, which is inrturnpivotedat. 9 upon a fixed support softhat by swinging to bring thepivotal. aint; a dfthe guard, member 7'belo'w itsfizied pivot-9, saidlever. will present the r ATENT- iorr ca..1

or oA'K rAnK, iLLINOIS, AssIe-Non' mammal-a man a7} Specification ofLetters iPatent; I

and it is held against this guide by means of the springlO anchored at10? upon the fixed pintle 8, and bearing a-tlO against the guard memberin the direction to yieldingl-y' urge the guard member against-theguide,

a When it isdesi-redto withdraw the guard 5 member from barrier;posi'tion,';; as, for: instance, when it is necessaryto change the-.die' or printing. form, lever 9 isswung to the dotted line position ofFigure 2 to cause its detent 11- to catch overthe resilient-arm 1-2, a

where the lever will be held with the guard member presented in. theposition rem'ote" from barrier ,positionuntildwork upon the press is tobe resumed-.;;; To avoidoversight in returning the gua'rd'memberitobarrier positiomthe arm 12 iscarried' by orother wise. connected-withthe lever- 6, so that in starting'the machine theguard will be.automatically released.

the lever 9 and; the guard 7 will assume barrier-position by gravitationwhenever. re leasedfrom the detaining arm .12, itis not necessary thatthey be so arranged and 'Whi-le in' the specificarrangement shownwhether they are or not, itaispreferable to employ means such, forinstance, as the spring 9 which, constantly urges the lever 9 in thedirectiontopresent.. the guard member in'barrierposi'tlon. This sprmgmaybe conveniently. arranged upon the ,fixed pintle 9*? ofthe-lever with;one endanchored to said pintle and .the other end engaged overaportionof thelever. e i The guard member 7 willi -normallyassume aposition sufiiciently closev to "the bed J l.to prevent introductionofrthe fingers Lbee neath it while. admitting the card-pr.v othermaterial to be printed, and will remain this position throughout'th'eiprin'ting opera? am. Asmara-e1- safeguardphgrveyerfithe I guardmember is made to yield outwardly from the printing position so thatthere will be no obstruction to prompt withdrawal otthe'fingers in casethey should; engage with the lower edge of the guard in withdrawing thecard. plished by the outward swinging of the entire guard member uponits pintle 8 in opposition to its spring 10, but preferably the lowerportion of the guard member is made to yield independently of theoutwardly swinging movement of the guard member as a whole, and to thisend said lower portion is provided with the pivoted gate 13 which willnot swing past vertical-position inwardly, but is free to swing fromvertical position outwardly. This gate will also yield outwardly in casethe fingers are in the path of theuard member while sliding towardbarrier position.

15 represents a handle through which to manipulate the guard. 16 is astop mounted on thepress in position to receive the pin 17 carried bythe lever 9 and arrest the latter when the guard member reaches barrierposition. The outer end of the stop 5 may carry an adjustable head 18for regulating the position at which the lever 9 is arrested and sincethe lever and guard member are so connected as to develop a toggleaction, it is obvious that the angle of the lever 9 in its-arrestedposition will determine the lower limit of travel of the guard memberand consequently the space left beneath the apron 13 for introductionand removal of the card.

' "I claim:

1. A guard for printing presses'comprising a guard member sliding to andfrom barrier position and a position remote from barrier position, apivoted lever connected with and imparting movement to said guard memberand a pivot support for said lever; said guard member being pivoted tosaid lever at a point removedfrom its pivot supportg'and said leverswinging vertically to bring, its connection with the guard member aboveand below its pivotal point in presenting the guard member in its twopositions aforesaid.

' 2. A guard for printing presses compris ing a guard member sliding toand from barrier position and a position remote from barrier position, apivoted lever connected wlth and lmpartmg movement to said guard member,and. a pivot support for said lever; sald. guard member being pivoted tosaid lever at a point removed from its pivot support; and said'leverswinging vertically to This 'may be accom-.

bring its connection with the guard member 3. A guard for printingpresses comprising a guard member sliding to and from barrier positionand apositior. remote from barrier position, a pivoted lever connectedwith and imparting movement to said guard member, and a pivot supportfor said lever; said guard member being pivoted to said lever at a pointremoved from its pivot support; and said lever swinging vertically toabove and below its pivotal point in presenting the guard member in itstwo positions aforesaid, and having means normally urging its swingingmotion in the direction to present the guard in barrier position.

4. A. guard for printing presses comprising a guard member sliding toand from barrier position and a position remote from barrier position,and a pivoted lever connected with and imparting movement to said guardmember; said guard member carrying a movable gate that resists movementof the operators hand toward the press and yields to resistanceencountered when carried by the guard member toward barrier position.

5. A guard for printing presses comprising a guard-member sliding to andfrom barrier position and a position remote 'from barrier position, anda pivoted lever connected with and imparting movement to said guardmember; said guard member having a gate thereon swinging transversely tothe direction of its sliding movement.

6. A guard for printing presses comprising a guard member sliding to andfrom barrier position and a position remote "from barrier position, anda pivoted lever connected with and imparting movement to said guardmember; said guard memberbeing pivoted to said lever; and springs beingprovided for both said lever and said guard member. which normally tendto swing them in the direction to present the guard member in barrierposition. I

7. A guardfor printing presses comprising a guard member sliding tobarrier position and a position remote from barrier position, a pivotedlever connectedfwith and imparting movement to said guard member, 115means normally urging the lever'in the di-' rection to present theguard. member in barrier position, and an arresting stop against whichthe lever impinges after bringing the guard member within reach of saidbarrier 12 position. p

8. A finger guard for printing presses comprising a guard member slidingto and 7 from barrier position, a pivoted lever upon which said guardmember is pivoted at 125 a point removed from the pivot of the lever andwhich develops with said guard member a toggle action, and by suchtoggle action projects the guard member to its barrier position, and astop which determines 13g the angle of throw of the lever and thereforethe barrier position of the guard memher.

9. A guard for printing presses comprising a guard member sliding tobarrier position and a position remote from barrier position, a pivotedlever connected with and imparting movement to said guard member, meansnormally urging the lever in the direction to present the guard memberin barrier position, and an arresting stop against which the leverimpinges after bringing the guard member within reach of said barrierposition; the guard member having a movement upon said lever; and saidmovement being free from the control of said stop.

10. A guard for printing presses comprising a guard member sliding toand from barrier position and a position remote from barrier position,and a pivoted lever connected with and imparting movement to said guardmember, having a releasable detent for retaining it with the guardmember in said remote position; said guard member having means urging aswinging movement thereof upon the lever toward guard position, andhaving a guide upon which it slides and against which it is held by saidlast-named means.

11. In a hand fed printing press, a guard sliding transversely to theline of feed to and from guarding position, a guide upon which saidguard slides, and means acting against the guard to press it against theguide. 4 I 4 12. In a hand fed printing press, a guard slidingtransversely to the line of feed to and from guarding position and alsohaving a swinging movement away from guarding position in the directionof withdrawal'of the feeding hand, and a guide defining the sliding pathof the guard.

18. In a hand fed printing press, a guard: sliding transversely to theline of feed to and from guarding position and also having a swingingmovement away from guarding position in the direction of withdrawal ofthe feeding hand, a guide defining the sliding path of the guard, andmeans yieldingly holding the guard against said guide.

Signed at Oak Park, Illinois, this 21st day of June, 1920.

GEORGE H. DUFOUR

